Yasuo Hamanaka lost $2.6 billion for Sumitomo.

Yasuo Hamakana, who was once nick-named "Mr. Five Percent" and "Mr. Copper" because of his aggressive trading style in the copper market, caused Sumitomo to lose $2.6 billion from his unauthorized copper trades on the London Metal Exchange.

As a result of his rogue trade, Hamakana was sentenced to eight years in prison in 1988. He was released in July 2005, a year before his sentence was supposed to end.

Well those trades weren't so good. Here are some trades that made investors a lot of money.